Filter

Subtypes

Separate or combine wavelengths

LP : Long Wave Pass Coating

HR for one single wavelength or a narrow band and HT for a longer wavelength or band, also available as Partial Reflector

Find an example here.


 

SP : Short Wave Pass Coating

HR for one single wavelength or a narrow band and HT for a shorter wavelength or band, also available as Partial Reflector

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NF : Notch Filter Coating

HR for one single wavelength or a narrow band and HT for a shorter and longer wavelength or band, also available as Partial Reflector

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MP : Multi Pass Coating

Combination of several HR and HT wavelength areas, also available as Partial Reflector

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BP : Band Pass Coating

Selecting a small wavelength area, sometimes also known as IF (Interference Filter), FWHM of some tens of nm down to < 1 nm, sputtered coating

Find an example here.


 

REF : Reflection Filter Coating

Scanning and selecting a small wavelength area by tilting 4 reflection filter plates simultaneously. No change in the final beam direction

Find an example here.